Free Red Seal Millwright Exam Flashcards

Lockout/tagout controls hazardous energy before work begins. It prevents unexpected startup, movement, or energy release while equipment is being serviced.

After isolating and locking energy sources, verify that the equipment cannot operate and stored energy has been controlled. Isolation is not complete until it is verified.

An SDS communicates a hazardous product's hazards, safe handling, required controls, first aid, and emergency information.

Resolution is the smallest change an instrument can display. Accuracy is how close its reading is to the true value; a fine display does not guarantee accuracy.

A controlled pattern spreads clamp load more evenly and helps prevent distortion, gasket damage, or uneven joint loading.

Preload is the clamping force created when a fastener is tightened. It keeps joint members compressed under service loads.

Drawings identify dimensions, tolerances, materials, interfaces, and assembly intent. Reviewing them first reduces rework and unsafe assumptions.

Level compares a surface to gravity. Alignment establishes the intended relationship between machine components or shafts; a machine can be level but misaligned.

A field-level risk assessment identifies changing hazards at the job site, chooses controls, and should be revisited when conditions or the task change.

WLL is the maximum load a rigging component may handle under stated conditions. Do not treat breaking strength as an allowable working load.

As a sling leg becomes more horizontal, tension in that leg increases. Evaluate leg angle and configuration before selecting rigging.

A suspended load rotates until its centre of gravity is directly below the hook. Plan pick points so the load remains controlled and stable.

Inspect slings, hooks, shackles, fittings, tags, and attachment points before a lift. Remove damaged or unidentifiable rigging from service.

A tag line helps guide a suspended load from a safer position. It does not make it safe to stand beneath, pinch, or ride the load.

Using one designated signal person avoids conflicting directions to the operator. Emergency stop signals must be understood and acted on immediately.

A prime mover converts an energy source into mechanical output. Examples include electric motors, internal-combustion engines, and turbines.

Radial load acts perpendicular to a shaft. Thrust load acts along the shaft's axis; bearing selection must match the load direction.

Apply installation force only to the bearing ring with the interference fit. Transmitting force through rolling elements can damage raceways.

A coupling transmits torque between shafts while accommodating the limited movement or misalignment allowed by its design.

Parallel misalignment means shaft centre lines are offset. Angular misalignment means shaft centre lines meet at an angle. Both can overload bearings and couplings.

An under-tensioned belt can slip, heat up, wear quickly, and lose transmitted power. Set tension to the manufacturer or site specification.

Proper lubricant reaches the chain's pin-and-bushing surfaces, where articulation causes wear. External coating alone does not protect those loaded joints well.

Backlash is the clearance between mating gear teeth. Some clearance is needed for lubrication and thermal expansion; too much can increase shock and positioning error.

Gear lubricant must provide the required film, wear protection, and temperature performance. The wrong grade or contamination can shorten gear and bearing life.

A key transfers torque between a shaft and hub. The fit must suit the design; a loose or damaged keyway can cause fretting and failure.

A clutch connects rotating members to transmit power. A brake resists motion to slow, stop, or hold a member.

Machines can move as they heat up. Cold alignment targets may need an offset so shafts align correctly at operating temperature.

A computerized maintenance management system records work history, inspections, parts, and recurring faults. Useful history supports better maintenance planning and failure analysis.

Cavitation occurs when local pressure falls enough for vapour bubbles to form and collapse. It can cause noise, vibration, loss of performance, and damage.

A centrifugal pump uses an impeller to add velocity and pressure. A positive-displacement pump traps and moves a fixed volume each cycle or revolution.

A centrifugal pump generally needs its casing and suction path filled with liquid before it can develop the pressure needed to move liquid reliably.

For a given fan system, increasing rotational speed increases airflow approximately in proportion to speed. Confirm equipment limits before changing speed.

A receiver stores compressed air, dampens pressure fluctuations, and gives moisture a place to separate before downstream use.

Cooling air between stages reduces its temperature and specific volume, which lowers the work required for later compression and protects equipment.

Pipe strain is force or moment transferred from piping into equipment nozzles. It can distort casings, upset alignment, and damage seals or bearings.

Tracking keeps a conveyor belt centred. Correct the root cause—such as misaligned idlers, pulley issues, loading, or tension—rather than forcing the belt sideways.

Safeguards separate people from hazardous robot motion. Defeating a guard or interlock to save time creates a serious exposure to unexpected movement.

Pressure applied to a confined fluid is transmitted throughout the fluid. Hydraulic force follows F = P × A, using consistent units.

A relief valve limits maximum system pressure by opening at its set pressure and diverting flow. It is a protective device, not a normal speed-control method.

A DCV routes fluid to start, stop, or reverse actuator motion. Its centre condition determines what happens when the valve is not actuated.

An accumulator stores fluid energy, commonly using compressed gas or a spring. It can supply short-term flow, absorb shocks, or maintain pressure.

Contaminants accelerate wear and can cause sticking, leakage, or erratic valve operation. Clean filling, filtration, and sampling protect fluid-power components.

A pneumatic filter-regulator-lubricator conditions compressed air: filter removes contaminants, regulator sets pressure, and lubricator is used only where specified.

Water in compressed air can corrode components, wash away lubricant, freeze at restrictions, and contaminate the process. Drains and dryers control it.

A vacuum system does not pull with negative pressure alone; atmospheric pressure creates the net force across a pressure difference.

Preventive maintenance follows planned intervals or conditions. Predictive maintenance uses condition data to detect developing defects and target work before failure.

Vibration analysis compares machine motion patterns over time to help identify developing faults such as imbalance, looseness, bearing damage, or misalignment.

Oil analysis can reveal lubricant condition, contamination, and wear debris. Trending results is more useful than treating one sample in isolation.

Commissioning verifies that installation, safety controls, lubrication, alignment, documentation, and functional checks meet the approved requirements before release to service.

Decommissioning starts with a controlled plan: isolate all energy, manage hazardous materials, secure the equipment, and document the equipment's status before removal or disposal.